English gold and agate watch with matching châtelaine Circa 1775

Gold verge lady’s watch 
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An excellent English 18 carat gold and agate watch with matching chatelaine, circa 1775. An engraved case, set with Jasper, matches the agate châtelaine. Champagne enamel dial, radial Roman numerals, outer arcaded minute ring and gold and diamond set hands. A hinged, frosted gilt full plate movement with engraved, fusee and chain, verge escapement, brass balance with flat balance spring, continental pierced balance cock, silver regulator dial. Movement signed.
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Diameter: 45 mm
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Thickness: 25 mm
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Signed: Joseph Martineau Senior  London
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Joseph Martineau was a renowned watchmaker who worked in London from around 1720 to 1760. He was the son of Joseph Martineau Senior and Marie Magdelene Fermignac. Martineau’s pocket watches were highly regarded for their exquisite workmanship and beautiful exterior features. Most of his pocket watches included a date feature, which was displayed through a small opening in the dial. The date numbers were present on a large wheel rim that advanced by one tooth every 24 hours. Martineau worked at Red Lion 65 Street, Clerkenwell, and Orange Street. It is also possible that some of the watches attributed to Joseph Martineau Junior were created by his father or were a collaboration between the father and son. A will from this period is known to exist, and he was located in Saint Martin’s Court (Saint Martin in the Fields) in 1760.